# Fermentation Profiles
To create a **Fermentation Profile**, Click the **Add Profile** button in the top left.
Then, select a **Profile Type**: **Fermentation**
Next, select a **Name** for your Profile (such as Hazy IPA)
Enter a **Description** for your Profile - this can be anything and is just intended for your reference.
Next, start adding profile steps!
Click the **Add** button to add a Profile Step
This will bring up a new dialog box which allows you to select and enter the desired step details.
### Details
This is where you enter the type and duration of each Step. Once you have finished each step, click the **Add Step** button to enter a new step.
### Step Options
**Step Type**
You can select the following Step Types and options
* **Step Name**
Here you can enter a name for each step - this is to allow you to identify each step (for example "Diacetyl Rest", "Cold Crash" etc
* **Heat/Cool to target Temperature**
This will heat (if needed until the target temperature is reached, and then maintain that temperature around the hysteresis of the unit
* **Gradual ramp to target over length of step**
This will ramp the temperature over the length of the selected step duration - for example, you may wish to raise the mash temperature from 64C-68C over 60 minutes.
* **Upper and Lower Limit**
This will maintain a temperature between *two* set point temperatures - you can set an upper and lower range for this.
* **Target Temperature**
Input the desired temperature for each step here
* **Go to next step when:**
* ***The step timer is finished*****:** This will start the next step as soon as the step timer is finished.
* ***The target temperature is reached:*** This will go to the next step as soon as the target temperature is reached regardless of step duration
* ***The target gravity is reached:*** This will go to the next step as soon as the target gravity is reached regardless of step duration. *NOTE: only applies when a Bluetooth Bonded Pill is used for temperature control*
* ***The gravity velocity is greater/less than:*** This will go to the next step as soon as the gravity velocity is wihin the specified range regardless of step duration. *NOTE: only applies when a Bluetooth Bonded Pill is used for*
* ***I press a button on the device*****:** You will need to manually push a button on the device to end the step. This is useful if you wish to (for example) not begin cold crashing until you have added pressure to the fermenter.
* **Step Duration:** Enter the Step Duration in Minutes, Hours or Days. This option is only available whe **The step timer is finished** is selected as the **Go to next step option**
* **Show Advanced Options:** This toggles **Advanced Options** On or Off
### Advanced Options
Advanced Options can be toggled on and off for each step
* **PID State:** Turn PID **On** or **Off.** PID is recommended for advanced users only. For best results PID setting s need to be dialled in for every fermentation
* **Allowed Sensor Differential:** This sets the Allowed Sensor Differential. This is the allowed differentiual between the element temperature and the Set Point temperature. This only applies when using a Bonded [Bluetooth RAPT Pill Hydrometer](https://kegland.com.au/products/yellow-rapt-pill-hydrometer-thermometer-wifi-bluetooth) as the temeprature probe
### **Alerts**
**Alerts** allows you to set up a custom alert for each step. You can add as many **Alerts** for each step as desired. You can select when to send the alert and also enter a custom **Alert** message (such as "Add Boil Hops Now")
You can set an alert when:
* **The Step Starts**
* **The Step Ends**
* **A specified amount of time has passed after the step starts**
* **The specified temperature is reached**
* **The specified gravity is reached** - Only applies when using a Bonded [Bluetooth RAPT Pill Hydrometer](https://kegland.com.au/products/yellow-rapt-pill-hydrometer-thermometer-wifi-bluetooth) as the temeprature probe
* **The gravity velocity is greater/less than the specified value** - Only applies when using a Bonded [Bluetooth RAPT Pill Hydrometer](https://kegland.com.au/products/yellow-rapt-pill-hydrometer-thermometer-wifi-bluetooth) as the temeprature probe
**To receive alerts on your mobile device, you must have the** [**Google Play** ](https://play.google.com/store/search?q=rapt\&c=apps)**or** [**Apple App Store** ](https://apps.apple.com/th/app/rapt/id1573192994)**app installed.**
In order to receive alerts you need to select **Enable Mobile App (Push) Notifications** in the My Account settings. You must also enable notifications for the Google Play or App Store App on your mobile device.
Once you are happy that all the Profile Steps and alerts are correct, make sure you hit the **Save** button to save the profile to your **My Profiles** library. You can then send it directly to your RAPT device using the **Send Profile to Device** button or using the **Play** button in the **Dashboard** to start a new profile!
To learn more about adavanced Fermentation Profile features such as Gravity Velocity triggers, please watch this video.
{% embed url="" %}
This [Sample Auto Profile - Gravity Velocity Trigger](https://app.rapt.io/profiles/view/495708b9-a1fd-4c97-4a46-08dd565f811e) can be downloaded to your RAPT account and can then be adjusted to suit if required. It illustatres how easy it is to have an automatic profile that suits almost every ale fermentation, and can easily be tweaked to suit lagers. **Note**: Requires a [Bluetooth Bonded RAPT Pill Hydrometer](https://kegland.com.au/products/yellow-rapt-pill-hydrometer-thermometer-wifi-bluetooth) in order to use Gravity and Gravity Velocity as a trigger.
**Congratulations! You have made a Fermentation profile and are ready to brew!**
to add a Profile Step
This will bring up a new dialog box which allows you to select and enter the desired step details.
### Details
This is where you enter the type and duration of each Step. Once you have finished each step, click the **Add Step** button 
to enter a new step.
button to save the profile to your **My Profiles** library. You can then send it directly to your RAPT device using the **Send Profile to Device** button 
or using the **Play** 
button in the **Dashboard** to start a new profile!
To learn more about adavanced Fermentation Profile features such as Gravity Velocity triggers, please watch this video.
{% embed url="